A new robust narrowband active noise control system with online secondary-path modeling and frequency mismatch compensation
Why this work is in the frame
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Bibliographic record
Abstract
Narrowband active noise control (ANC, NANC) systems provide excellent performance in suppressing the annoying noise signals generated by rotating machines, which may be modeled as sinusoidal signals in additive noise. In realworld applications, two important issues including secondary path modeling (SPM) and frequency mismatch (FM), namely, the error of the nonacoustic timing signal sensor, need to be addressed by the NANC system in order to achieve sufficient noise reduction. In this paper, a new robust NANC system is proposed which contains three subsystems, namely: 1) an online secondary-path modeling subsystem designed to track the time-varying secondary path, 2) an FM compensation subsystem providing modified frequencies to every ANC channel, and 3) a cost reduction subsystem where only two x-filtering blocks are placed regardless of the number of the targeted frequencies. The three subsystems are seamlessly integrated such that the entire NANC system enjoys great advantages in both noise reduction and computational efficiency. Simulation results as well as application to real noise are conducted to demonstrate the effectiveness and capabilities as well as robustness of our proposed system.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it